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You know you're holding a serious piece of sound equipment when you feel the heft of a JX amp. JL Audio designed these amplifiers with sturdy, high-grade parts that ensure excellent heat management, provide high current flow, and deliver stable performance in almost any situation. You won't find blinking lights or meters on the outside of these amps, but you will find oversized output transistors and rugged MOSFET power supplies inside. The sleek, high-mass aluminum heatsink keeps things cool enough to virtually eliminate thermal shut-downs.

The JX360/4 4-channel amp delivers 70 watts RMS per channel to your front and rear speakers, and it's a great match for high-quality component speakers. You can also switch over to 2-channel mode, and power a pair of subs with 180 watts RMS each. Use the variable low-pass filter and bass boost to tune the amp to your subwoofer system. The amp includes speaker-level inputs, along with preamp inputs and outputs, so it's ready to work in virtually any system.

Product Highlights:

4-channel car amplifier

70 watts RMS x 4 at 4 ohms (90 watts RMS x 4 at 2 ohms)

180 watts RMS x 2 at 4 ohms

Class AB amplifier design

MOSFET switching power supply

frequency response: 20-20K Hz

variable high- and low-pass filter (50-200 Hz, 12 dB/octave)

preamp inputs and outputs

speaker-level inputs

4-gauge power and ground leads and a 50-amp fuse recommended  wiring and hardware not included with amplifier

no onboard fuses  when installing multiple amps in a system, an additional 50-amp in-line fuse between the distribution block and the amplifier is recommended

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

Product Research

Features

Four-channel Class A/B Amplifier: The JL Audio JX360/4 is a
four-channel, full-range (20-20,000Hz) audio amplifier utilizing Class A/B
technology. The JX360/4 can be operated with a wide variety of source units
(aftermarket or factory) and system configurations (4-channel, 3-channel,
2-channel, or mono).

MOSFET Switching Power Supply: The JL Audio JX series four-channel
amplifier employs a rugged MOSFET power supply for outstanding reliability and
operational stability.

Amplifier Ratings:

JX360/4 Amplifier
Specifications

Channels

Watts

Ohms

Frequency Response

Signal-to-Noise

THD

Rated Continuous
(RMS) Power @ 14.4V

4

70

4

20-20,000 Hz

80 dB

1%

4

90

2

20-20,000 Hz

80 dB

1%

2 (bridged)

180

4

20-20,000 Hz

80 dB

1%

Rated Continuous
(RMS) Power @ 12.5V

4

55

4

20-20,000 Hz

80 dB

1%

4

80

2

20-20,000 Hz

80 dB

1%

2
(bridged)

160

4

20-20,000 Hz

80 dB

1%

High-Mass Heat Sink: A heavy extruded aluminum heat sink is designed
to keep the JL Audio JX series amplifier in a comfortable thermal range during
demanding operation. This high-mass, extruded heat sink removes heat from the
amplifier circuitry, extending high-power operation. This improves reliability
and reduces the frequency of thermally related shut-down event.

Protection Circuitry: The JX360/4's protection circuitry automatically
shuts the amplifier down if thermal limits are exceeded, a short-circuit is
detected in the speaker wiring, or if low supply voltage limits are reached.

Status Indicator Lights: There are two status indicator
lights on the right side of the amplifier.

Power (Green): This LED lights green to indicate that
the amplifier is turned on and operating normally.

Protect (Red): The Protection LED lights Red to
indicate the amplifier's protection circuitry has been activated to prevent
product failure due to thermal overload, a short-circuit, or a dangerously
low impedance connected to the amplifier's outputs.

Controls

Input Sensitivity: The four-channel amplifier's Input
Sensitivity Control is used to match your source unit's output voltage to the
input stage of the amplifier for maximum clean output. The JX360/4 is equipped
with an independent Input Sensitivity Control for the Front (1/2) & Rear (3/4)
channels.

Low-Level Input Range: 200mV-4V (RMS)

High-Level Input Range: 2V-10V (RMS)

Input Mode: This switch allows operation of all four amplifier
channels with only one pair of input signals (2-CH Input Mode) or with
independent front and rear input signal pairs (4-CH Input Mode).

Note: You will only need to connect the front RCA inputs when
placing the amplifier in 2-CH input mode.

Variable Crossover: The variable filter design employed in the JX360/4's crossover section allows you to switch filter modes and
change filter frequencies for the amplifier's Front (1/2) & Rear (3/4) channels. The JX360/4 offers the following crossover
adjustments along the amp's side-panel.

Filter Mode: The amplifier allows you to select either
a Low Pass, High Pass or Full-Range operation for the amplifier's Front
(1/2) & Rear (3/4) channels.

Variable Frequency: You can set the amplifier's Low
Pass or High Pass crossover from 50 to 200 Hz for the amplifier's Front
(1/2) & Rear (3/4) channels.

Connections

Power/Ground/Turn-On Terminals: The four-channel amplifier
features set-screw terminals for the power, ground, and remote turn-on
connections.

Power and Ground: The JL Audio amplifier's set-screw
Power and Ground connections are designed to accept 4 to 2 AWG power wire. A
2.5mm hex-wrench is supplied for making connections.

Remote Turn-On: The JL Audio JX series amplifier's set-screw
turn-on lead will accept 18 to 8 AWG wire. The same 2.5mm hex-wrench is
supplied for making connection.

Note: The Amplifier is not equipped with a fuse. An
external 50-amp AFS, AGU, or MAXI fuse (not included) must be installed on
the power wire. If a wiring kit is used which includes a fuse with a value
other than 50-amps, the original should be replaced with a 50-amp fuse

Speaker Output Terminals: The JX360/4 amplifier's eight
set-screw speaker terminals will accept 16 to 8 AWG speaker wire. The
amplifier's speaker terminals can be wired in a 4-channel, 3-channel, or
2-channel configuration.
A 2.5mm hex-wrench is supplied for making connections.

Preamp Inputs: The four-channel amplifier features two sets of
stereo RCA input jacks. The amplifier features a dedicated Input Sensitivity
gain control for the Front (1/2) & Rear (3/4) channel inputs. These controls are designed to match the input
sensitivity of the JX360/4 to the specific signal source that is feeding it. The
amplifier's low-level input can be set between 200mV-4V RMS.

Speaker Level Inputs: The JL Audio JX360/4 also accepts speaker level
signals, including those from factory systems (without the need for a
line-output converter), via two 10" speaker-level harnesses (included). The
amplifier's high-level input can be set between 2V-10V RMS.

Preamp Outputs: The JX360/4 incorporates a pass-through
preamp output sections, so that additional amplifiers can easily be connected to
the same signal(s) feeding the four-channel amplifier. These preamp output
signals are buffered to prevent noise and are always preamp level, regardless of
the level of signals feeding the amplifier's inputs.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to
find elsewhere. That's because we have our own in-house Product Research
team. They verify what’s in the box, check the owner's manual, and record
dimensions, features and specs. We stay on top of new products and technologies
to help people make informed choices.

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Power

flexible

Written By Seth, Monroe,NC on Monday, August 04, 2014

Great amp I knew this amp would be good but when I hooked it up I had engine noise bad.Then I remembered I ran the rca and power wire's on the same side my mistake that's a big no no.Luckily I was able to tune the amp and get rid of the noise just turned down the gain and offset the volume on my head unit.JL saved me again I sure didn't want to have to rip the wire's back out.sounds great!

clean sound

The amp delivers great clean sound throughout the sound spectrum. I installed it in my car that has high performance loud exhaust. This amp still provides the level of volume and quality of sound I require. Great product for most any application. It looks great mounted on the backs of my seats as well.

WoW

Written By Mustang Dan, dracut mass on Wednesday, July 04, 2012

All i can say is wow and wow if i could give it more than a 5i i would I was kinda turn off by the price seem kinda low for a good amp but the amp is great cant ask for more the price is very low for what you get cant ask for more does JL make anything that isnt top of the line? i think not

Pros:$$$$ loud clean

Cons:JL audio never has cons they dont sell something if it isnt great

Excellent Amp from an Excellent Brand

This amp was bought to mate with a JL SLASH 500/1v2 and WoW what an Awesome System! Incredible sound and Loud very very Loud with ZERO Distortion.

POS:

-Aluminium Heatsink

-Built Quality (Impressive)

-Independent HPF & FQs

-Clear + Zero Distortion Sound

-4 AWG Power Cables and Grounds

CON:

-A little Large

-No 24db/oc < But not Important for my Setup.

-Price a bit Steep but you Can Find better Prices if You Look Right...

NOTE: If you care for adjust the Gains from the Manual just make Sure you dont go Beyond 16v output + Adjustments (Bass Boost, Etc.) it Will go into Protect in 20 minutes with a Moderate Volume. (Im Sitting at 14.80v Fronts and 15v Backs) and I can crank the volume all the way +3/4 without clipping or distortion and its so Loud I cant hear a person sitting besides me...